package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.PasswordConstant;
import com.sky.constant.StatusConstant;
import com.sky.context.BaseContext;
import com.sky.dto.EmployeeDTO;
import com.sky.dto.EmployeeLoginDTO;
import com.sky.dto.EmployeePageQueryDTO;
import com.sky.entity.Employee;
import com.sky.exception.AccountLockedException;
import com.sky.exception.AccountNotFoundException;
import com.sky.exception.PasswordErrorException;
import com.sky.mapper.EmployeeMapper;
import com.sky.result.PageResult;
import com.sky.service.EmployeeService;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.util.DigestUtils;

import java.time.LocalDateTime;
import java.util.List;

@Service
public class EmployeeServiceImpl implements EmployeeService {

    @Autowired
    private EmployeeMapper employeeMapper;

    /**
     * 员工登录
     *
     * @param employeeLoginDTO
     * @return
     */
    public Employee login(EmployeeLoginDTO employeeLoginDTO) {
        String username = employeeLoginDTO.getUsername();
        String password = employeeLoginDTO.getPassword();

        //1、根据用户名查询数据库中的数据
        Employee employee = employeeMapper.getByUsername(username);

        //2、处理各种异常情况（用户名不存在、密码不对、账号被锁定）
        if (employee == null) {
            //账号不存在
            throw new AccountNotFoundException(MessageConstant.ACCOUNT_NOT_FOUND);
        }

        //密码比对

        password = DigestUtils.md5DigestAsHex(password.getBytes());


        if (!password.equals(employee.getPassword())) {
            //密码错误
            throw new PasswordErrorException(MessageConstant.PASSWORD_ERROR);
        }

        if (employee.getStatus() == StatusConstant.DISABLE) {
            //账号被锁定
            throw new AccountLockedException(MessageConstant.ACCOUNT_LOCKED);
        }

        //3、返回实体对象
        return employee;
    }

    @Override
    public void save(EmployeeDTO dto) {
        System.out.println("service中的线程id是: " + Thread.currentThread().getId());
        Employee employee = new Employee();

        //对象的属性拷贝
        BeanUtils.copyProperties(dto,employee);

        //设置密码
        employee.setPassword(DigestUtils.md5DigestAsHex(PasswordConstant.DEFAULT_PASSWORD.getBytes()));

        //补全employee对象的剩余属性
        employee.setStatus(StatusConstant.ENABLE);

        //创建时间和修改时间
//        employee.setCreateTime(LocalDateTime.now());
//        employee.setUpdateTime(LocalDateTime.now());

        //TODO 创建人和修改人 暂时写死,回头补
        // 我们应该把登录人的id存储到创建人和修改人中去
//        employee.setCreateUser(BaseContext.getCurrentId());
//        employee.setUpdateUser(BaseContext.getCurrentId());



        employeeMapper.save(employee);
    }

    @Override
    public PageResult page(EmployeePageQueryDTO dto) {
        /**
         * 使用分页插件来完成该功能
         * 1,开启分页查询功能
         */
        PageHelper.startPage(dto.getPage(),dto.getPageSize());

        //select count(*) from employee

        //查询所有
        Page<Employee> page = (Page<Employee>) employeeMapper.page(dto.getName());

        //获取总条数
        long total = page.getTotal();

        //获取当前页的列表数据
        List<Employee> result = page.getResult();


        return new PageResult(total,result);
    }

    @Override
    public void startOrStop(Integer status, Long id) {

        //自定义一个员工对象
        /*Employee employee = new Employee();
        employee.setId(id);
        employee.setStatus(status);*/

        Employee employee = Employee.builder().id(id).status(status).build();
        employeeMapper.updateEmpById(employee);
    }

    @Override
    public Employee getEmployeeById(Integer id) {
        Employee employee = employeeMapper.getEmployeeById(id);

        employee.setPassword("******");

        return employee;
    }

    @Override
    public void updateEmployeeById(EmployeeDTO dto) {
        Employee employee = new Employee();

        BeanUtils.copyProperties(dto,employee);

//        employee.setUpdateTime(LocalDateTime.now());
//        employee.setUpdateUser(BaseContext.getCurrentId());

        employeeMapper.updateEmpById(employee);
    }
}
